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3 years ago

Please help ASAP !!!??

Mathematics

1 answer:

inn [45]3 years ago

8 0

<h3>✽ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ✽</h3>

➷ Multiply the expressions so they have a denominator of 10

Once you have done this, you can add them

The answer would be option B

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ ♡

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a small rocket is shot from the edge of a cliff suppose that after t seconds the rocket is y meters above the cliff where y=30t-

Natalka [10]

Answer:

Greatest height: 45 meters

Time for greatest height: 3 seconds

Height after 5 seconds: 25 meters above the cliff

Time for height of 40 meters: 7.123 seconds

Height after 7 seconds: -35 meters (35 meters below the cliff)

Step-by-step explanation:

to find the maximum height, we need to calculate the derivative of y in relation to t and then find when dy/dt = 0:

dy/dt = 30 - 10t = 0

10t = 30

t = 3 seconds

In this time, the height is:

y = 30*3 - 5*3^2 = 45 meters

After 5 seconds, the height is:

y = 30*5 - 5*5^2 = 25 meters

The time for the height of 40 meters is:

40 = 30t - 5t^2

t^2 - 6t - 8 = 0

Using Bhaskara's formula, we have:

Delta = 6^2 + 4*8 = 68

sqrt(Delta) = 8.246

t1 = (6 + 8.246) / 2 = 7.123 seconds

t2 = (6 - 8.246) / 2 = -1.123 seconds (negative value for time is not valid)

So the time when the rocket reaches 40 meters is 7.123 seconds

After 7 seconds, the height is:

y = 30*7 - 5*7^2 = -35 meters

The rocket will be 35 meters below the cliff.

5 0

2 years ago

What is the sum of 1/2 + 1/4? A. 2/8 B. 2/6 C. 4/8 D. 6/8

Pie

3/4 is the total.

See attached image for explanation.

Please consider marking "Brainliest".

Thanks <3

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2 years ago

Each person in a group buys a movie ticket, a drink, and a popcorn. How much does the group pay when there are 6 people in the g

evablogger [386]

Answer: 81

Step-by-step explanation:
6.75 + 3 + 3.75 = X
X x 6 = 81

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1 year ago

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Can anyone answer this question ?

kondaur [170]

X1=radical 6--->2.44
X2=-radical 6/3--->-0.816

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3 years ago

How do you write 35 over 20 As a percentage

lara31 [8.8K]

In order to write $\frac{35}{20}$ as a percentage, we must first convert the fraction into a decimal. We can do that simply by dividing.

35 / 20 = 1.75

In order to convert a fraction to a decimal, we must multiply it by 100

1.75 * 100 = 175%

$\frac{35}{20}$ as a percentage is 175%.
Hope that helped =)

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2 years ago

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